Description
A flaw was found in libssh. A malicious SFTP server can send responses for unknown request IDs that libssh clients keep queued indefinitely, causing unbounded memory growth and client-side denial of service.
Affected products
libssh: libssh; redhat: hardened images; redhat: enterprise linux
References6
- access.redhat.com/errata/RHSA-2026:42922 Vendor Advisory
- access.redhat.com/security/cve/CVE-2026-59848 Vendor Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2498181 Issue TrackingVendor Advisory
- access.redhat.com/errata/RHSA-2026:55855
- access.redhat.com/errata/RHSA-2026:62217
- access.redhat.com/errata/RHSA-2026:62218
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - EPSS — exploit probability
- 0% percentile: 28 · as of 14 November 2026
- CWE
- CWE-770
Could this be exploited in your environment?
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